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  1. #1
    Join Date
    Jul 2012
    Post Likes

    Evaluating Water Package Unit Chiller effeciency

    Hi all,

    I have to evaluate the efficiency of water package unit chiller to determine the real needs of cooling capacity for replacing the old chiller. It still uses R -22 as refrigrant. My question is about how to calculate thermal side to determine the efficiency. I think there are two way to calculate it :
    1. Calculating the heat rate (J/s) of refrigerant in evaporative coil by measuring the temperature and pressure at the refrigeration cycle so I get the enthalpy difference in before and after coil by looking the R-22 graph. OR
    2. Calculating the heat rate (J/s) of water in evaporative coil by measure the temperature and velocity of air to get mass flow rate.

    Am I right? and if I am right, Which way is better in accuracy and easiness to do?

    Thank you for your help.

  2. #2
    Join Date
    Sep 2004
    Post Likes
    could you just do kw per ton?
    true knowledge exists in knowing that you know nothing.

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